\begin{tikzpicture}[>=Stealth, scale=0.8]
    \draw [thick] (0, 0) rectangle (10, 4);
    \draw [thick] (7, 0) -- (7, 4);

    \node at (2, 1) {\Large{虚数集}};

    \draw [thick] (4, 0.5) rectangle (6, 2.3);
    \node at (5, 1.8) {\Large{纯虚}};
    \node at (5, 1) {\Large{数集}};

    \node [fill=white, inner sep=0] at (7, 3.3) {\huge{复数集}};

    \node at (8.5, 1) {\Large{实数集}};
\end{tikzpicture}

